Uninstalls Gandalf for Bree/Rohan v1.0, and restores DaC v1.2 to original state
1) Download the attached file named "Gandalf For X - uninstall to DaC 1.2"
Will return the game into working order for Divide and Conquer v1.2, assuming you have not had any other submods installed at the same time.
2) Extract it into .../Medieval II Total War/mods/Third_Age_3
(or corresponding folder if you renamed Third_Age_3, where you have installed DaC)
3) Accept Overwrite All